CAREER: Sea Level and Topographic Evolution (SLATE): Exploring the feedback between sea level and sediment redistribution

职业：海平面和地形演化（SLATE）：探索海平面和沉积物重新分布之间的反馈

• 批准号: 2045433
• 负责人: Ken Ferrier
• 金额: $ 67.69万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-08-01 至 2026-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2045433&HistoricalAwards=false
• 关键词: CAREER; Sea; Level; Topographic; Evolution

Sea-level changes are of wide interest because they affect flood hazards, reorganize coastlines, influence volcanic eruptions, and reflect changes in climate. The proposed work will remove a barrier for understanding sea-level change by developing a new model that captures the effects that sediment redistribution and sea-level change have on one another. This will provide a new tool for understanding the controls on sea-level change and flood hazards near large rivers, which are home to many coastal cities, of relevance to NSF’s Coastlines and People (CoPe) initiative. These efforts will be paired with four education and outreach tasks focused on sea-level change, including the development of a new university course on sea-level change, training of students in pedagogy and mentorship, public outreach through the University of Wisconsin Geology Museum, and a five-year outreach program to K-12 students from underrepresented groups in STEM. The goal of this project is to improve our understanding of the feedback between sea level and sediment redistribution. Although it has long been known that sea level and sediment redistribution influence one another, the quantitative strength of this feedback remains a matter of contention. The proposed work is aimed at closing this knowledge gap through the development of a novel model that couples Earth’s topographic evolution to sea-level change. This will be used to explore the controls on the sediment-sea level feedback by quantifying the sensitivity of sea-level changes to marine sediment transport, the sensitivity of lowland rivers to sea-level change, and the effects of sediment redistribution on estimates of global mean sea level and global ice volume at the Last Interglacial period, an analogue for modern climate. This will clarify the sensitivity of sea-level change to sediment erosion and deposition—a common feature of Earth’s coasts—and provide a basis for improving projections of future sea-level change. This will support education, outreach, and diversity initiatives through the training of two PhDs students, the mentoring of undergraduate students, and a new five-year outreach program with K-12 students from underrepresented groups in STEM. The project is co-funded by the Geomorphology and Land-use Dynamics Program and the Marine Geology and Geophysics Program.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

海平面变化引起广泛关注，因为它们会影响洪水灾害、重组海岸线、影响火山喷发并反映气候变化。拟议的工作将通过开发一种捕捉海平面变化影响的新模型来消除理解海平面变化的障碍。沉积物重新分布和海平面变化相互影响，这将为了解大河流附近海平面变化和洪水灾害的控制提供一种新工具，这些河流是许多沿海城市的所在地，与 NSF 的海岸线和相关。这些努力将与以海平面变化为重点的四项教育和外展任务相结合，包括开发关于海平面变化的新大学课程、对学生进行教学和指导培训、通过威斯康星大学地质博物馆，以及针对 STEM 中代表性不足群体的 K-12 学生的一项为期五年的外展计划，该项目的目标是提高我们对海平面和沉积物重新分布之间的反馈的了解，尽管这一点早已为人所知。海平面和尽管沉积物重新分布相互影响，但这种反馈的定量强度仍然是一个有争议的问题。拟议的工作旨在通过开发一种将地球地形演变与海平面变化耦合起来的新模型来缩小这一知识差距。通过量化海平面变化对海洋沉积物输送的敏感性、低地河流对海平面变化的敏感性以及沉积物重新分布对全球平均海平面和沉积物估计的影响，探索沉积物-海平面反馈的控制全球冰量最后一个间冰期，现代气候的类比，这将阐明海平面变化对沉积物侵蚀和沉积（地球海岸的共同特征）的敏感性，并为改进未来海平面变化支持教育的预测提供基础。通过培训两名博士生、指导本科生以及针对 STEM 中代表性不足群体的 K-12 学生开展一项新的五年推广计划，该项目由 Geomorphology 和 Geomorphology 共同资助。土地利用动力学计划以及海洋地质和地球物理学计划。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。